JaLCDOI 10.18926/15697
FullText URL Mem_Sch_Eng_OU_5_61.pdf
Author Misaki Takayoshi| Okamoto Takuji| Yamamoto Hideki|
Abstract An asynchronous delay line for PAM signal having controlled delay capability is proposed. The delay line in a cascaded chain of identical memory cells. Each sample of the sequence of the input PAM signals passes or is shifted in particular cell depending on whether the succeeding cell is empty or not. A cell is composed of two memory capacitors with the peripheral control circuits. In this paper, especially, an example of the circuit for cell is shown and its several characteristics are discussed. At the end, some experimental results are given.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 61
End Page 66
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307866
JaLCDOI 10.18926/15694
FullText URL Mem_Sch_Eng_OU_5_55.pdf
Author Takeda Akira| Wada Satosi| Uno Takaaki| Fujita Haruki| Okamoto Tuneyuki|
Abstract The importance of the presence of butenolide groupings in biologically active substances has been recognized increasingly. (1) In our search for new pesticides we have prepared 26 α-arylamino-γ-aryl-⊿(α,β)-butenolides (1-26) and 9 α-arylidene-γ-aryl-⊿(α,β)-butenolides (27-35) which seemed to us of interest as test materials for the screening. α-Arylamino-γ-aryl-⊿(α,β)-butenolides were prepared by the reaction of sodium or potassium arylidenepyruvate with arylamines in the medium of glacial acetic acid as is reported by Meyer and Vaughan(2) (Scheme I, see also Experimental Section). α-Arylidene-γ-aryl-⊿(β,γ)-butenolides were prepared by the condensation of aromatic aldehydes with β-aroylpropionic acids in the presence of anhydrous sodium acetate. The analogous procedure for this purpose has been reported by several authors(3) (Scheme II). The physical properties, yields, and analytical data of these compounds have been summarized in Table I (1-26) and Table II (27-35).
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 55
End Page 59
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307512
JaLCDOI 10.18926/15691
FullText URL Mem_Sch_Eng_OU_5_47.pdf
Author Takahashi Katsuaki| Miura Yoshinari|
Abstract Diffusion phenomena of silver ion in the molten sodium diborate of low silver ion content were investigated at the temperature range from 880℃ to 625℃ by means of chronopotentiometry. From the results, it was shown that the silver ion was reduced reversibly to metallic state at the silver electrode used and silver ion was transported only by diffusion in case that transition time in a potential-time relation was within several seconds. Diffusion coefficients measured at various temperatures satisfied Arrhenius equation. The activation energy of diffusion and diffusion coefficient were respectively 32Kcal/mol and 6.5×10(-7) cm(2)/sec at the liquidous temperature. By comparing these values with those obtained in some molten salts, the difference of structure between the molten glass and molten salts was discussed. Moreover, the consideration for the size of borate anion existing in the molten glass was also tried from the viewpoint of rate process and from Stokes-Einstein's equation.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 47
End Page 53
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307810
JaLCDOI 10.18926/15686
FullText URL Mem_Sch_Eng_OU_5_31.pdf
Author Wada Tsutomu| Shimizu Akira|
Abstract Though the Warren's fluidic counter has a very simple construction, the matching problems of the main jet supply pressure with the input pulse may take place and so there may be some working conditions under which this counter cannot work. Up to now, these matching problem have been hardly investigated. In this study the following things were systematically investigated : the static and dynamic characteristics of the memory and the control flip-flops with different geometric parameters, the behavior of the counter which are constructed by two of them, and finally the fow in the counter. The obtained results are as follows : (1) Under some clear and accurate conditions, the Warren's counter works satisfactory without any au iliary circuit. (2) In the control part, the input pulse flow don't reattach on any side wall, but branches into both output ports. (3) The necessary condition under which the Warren's counter behaves successfully is as follows : (1-2α)Q(i)>Q(ms), where α is the distribution factor of the control part, is the input pulse flow rate and is the switching control flow rate of the memory part.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 31
End Page 35
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307883
JaLCDOI 10.18926/15683
FullText URL Mem_Sch_Eng_OU_5_27.pdf
Author Kikuchi Susumu| Osaki Hirokazu| Ohgishi Shinji|
Abstract The work load given to workers by a monotonous task was investigated. Their load was obtained by measuring the flicker value and observing its fluctuation pattern. Each flicker fluctuation was classified into one of the three patterns. It was found that the mental load of the subject carrying out the task by himself tends to become lighter according as the speed increases, while the mental load of the subject doing the task with his companion does not show this tendency. On the other hand, the scores of the disposition tests were analyzed with regard to the flicker fluctuation pattern by using the discriminant function.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 27
End Page 30
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307841
JaLCDOI 10.18926/15682
FullText URL Mem_Sch_Eng_OU_5_17.pdf
Author Shimamoto Yuzuru| Tanaka Yutaka|
Abstract This paper deals with a combustion stability of diffusion flame. A simplified linear differential equation of second order, which involves the parameters estimated from the states of steady combustion, has been suggested to discuss theoretically the nature of oscillatory combusion about a two-dimensional combustion chamber. Its validity has been testified by comparing calculated results with experimental ones. Results obtained have indicated that factors markedly affecting the low-frequency oscillatory combustion are primary volumetric air-fuel ratio, duct length of combustion side, shape of burner and inlet throttles. But outlet throttle gives little effect on the stability of combustion.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 17
End Page 26
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307571
JaLCDOI 10.18926/15680
FullText URL Mem_Sch_Eng_OU_5_7.pdf
Author Hosokawa Norio|
Abstract The loading and residual stresses measured by using X-ray stress measurment depend on diffraction plane. In order to make clear its cause, the several models on elastic and plastic deformations are developed and the theoretical values are compared with measured ones. It was found that the dependencies of measured stress on the diffraction plane can be explaned by accepting Reuss's model for elastic deformation and Taylor's model for plastic deformation.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 7
End Page 15
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307629
JaLCDOI 10.18926/15677
FullText URL Mem_Sch_Eng_OU_5_1.pdf
Author Honda Kazuo| Konaga Tetsuro|
Abstract X-ray microbeam diffraction technique is a useful one to investigate the features of the crystal deformation in a localized area. That is, this method have been adopted to examine the density and array of dislocation, microscopic lattice strain and macroscopic residual stress. And so, the informations obtained from the tip of the crack during the fatigue process have been correlated with the behaviours of the initiation and propagation of the crack. The authors, in the present paper, investigated a relation between the distributions of the microscopic lattice strains which are calculated and measured by the technique, and suggested the sort of dislocation at the tip of the crack that relate to the fatigue crack propagation. The crack initiated at the notch root of the specimen which was composed of the coarse grain and propagated along the grain-boundary in the early stage under fatigue process of the alternating stress 4.1 kg/mm(2). Thereafter, it changed the propagating direction toward the inside of the grain. The distributions of the micro lattice strain in each reflecting plane which were measuerd at the plastically deformed zone in the vicinity of the grainboundary and at the crack tip agreed well with modes of the strain distribution due to a screw and a edge dislocations by the calculation, respectively. From these results, the authors concluded that the fatigue crack propagation would relate closely to the changing in the sort of the dislocation from the screw to the edge.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1970-09-01
Volume volume5
Issue issue1
Start Page 1
End Page 6
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307657